<template>
    <div class="app-container">
        
        
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>
          <!--
          v-show：是否显示上传组件
          :key：类似于id，如果一个页面多个图片上传控件，可以做区分
          :url：后台上传的url地址
          @close：关闭上传组件
          @crop-upload-success：上传成功后的回调 -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API+'/edu/oss/file'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>
      </el-form-item>


      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>


    </div>
</template>

<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
    components: { ImageCropper, PanThumb },
    data () {
        return {
            teacher:{},
            saveBtnDisabled:false, //是否使能保存按钮
            imagecropperShow:false,//上传图片框是否显示
            imagecropperKey:0,//上传组件key值
            BASE_API:process.env.BASE_API
        }
    },
    created () {//页面渲染前执行
        this.init()
    },
    watch: {//监听
      $route(to,from){//路由变化方式，路由发生变化，方法就会执行
        this.init()
      }
    },
    methods: {
        close(){
          this.imagecropperShow=false
          //对上传组件进行初始化(解决上传完照片后，想重新上传照片，再次点开显示已上传成功)
          this.imagecropperKey=this.imagecropperKey+1
        },
        cropSuccess(data){//上传成功后
          this.imagecropperShow=false
          this.imagecropperKey=this.imagecropperKey+1
          this.teacher.avatar = data.url
        },
        init(){
          //判断路径是否有id值
          if(this.$route.params && this.$route.params.id){
            //从路径获取id值
            const id = this.$route.params.id
            //调用根据id查询的方法
            this.getInfo(id)
          }else{
            //路径中没有id值，是添加操作，则清空表单
            this.teacher={}
          }
        },
        saveOrUpdate(){
          //判断是修改还是添加
          //根据teacher是否有id
          if(!this.teacher.id){
            //添加
            this.saveTeacher()
          }else{
            //修改
            this.updateTeacher()
          }
            
        },
        
        updateTeacher(){
          teacherApi.updateTeacher(this.teacher)
          .then(response=>{
            //提示信息
              this.$message({
                type:'success',
                message:'修改成功!'
              })
              //回到列表页面  路由跳转
              this.$router.push({path:'/teacher/table'})
          })
        },
        saveTeacher(){
            teacherApi.addTeacher(this.teacher)
            .then(response=>{
              //提示信息
              this.$message({
                type:'success',
                message:'添加成功!'
              })
              //回到列表页面  路由跳转
              this.$router.push({path:'/teacher/table'})
            })
            .catch(error=>{

            })
        },
        //根据id获取讲师
        getInfo(id){
          teacherApi.getTeacherInfo(id)
          .then(response=>{
            this.teacher=response.data.teacher
          })
        }
    }
}
</script>